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						<h1>Source for file DomCaptcha.class.php</h1>
<p>Documentation is available at <a href="../DomBase/_libs---DomBase---DomCaptcha---DomCaptcha.class.php.html">DomCaptcha.class.php</a></p>
<div class="src-code">
<div class="src-code"><ol><li><div class="src-line"><a name="a1"></a><span class="src-php">&lt;?php</span></div></li>
<li><div class="src-line"><a name="a2"></a><span class="src-doc">/**</span></div></li>
<li><div class="src-line"><a name="a3"></a><span class="src-doc">&nbsp;*&nbsp;Usage&nbsp;sampe:</span></div></li>
<li><div class="src-line"><a name="a4"></a><span class="src-doc">&lt;code&gt;</span></div></li>
<li><div class="src-line"><a name="a5"></a><span class="src-doc">//Creating&nbsp;and&nbsp;outputing&nbsp;image</span></div></li>
<li><div class="src-line"><a name="a6"></a><span class="src-doc">$c&nbsp;=&nbsp;new&nbsp;DomCaptcha('MyAlias');</span></div></li>
<li><div class="src-line"><a name="a7"></a><span class="src-doc">$c-&gt;width&nbsp;=&nbsp;100;</span></div></li>
<li><div class="src-line"><a name="a8"></a><span class="src-doc">$c-&gt;height&nbsp;=&nbsp;40;</span></div></li>
<li><div class="src-line"><a name="a9"></a><span class="src-doc">$c-&gt;characters&nbsp;=&nbsp;5;</span></div></li>
<li><div class="src-line"><a name="a10"></a><span class="src-doc">$c-&gt;show();</span></div></li>
<li><div class="src-line"><a name="a11"></a>&nbsp;</div></li>
<li><div class="src-line"><a name="a12"></a><span class="src-doc">//&nbsp;validating</span></div></li>
<li><div class="src-line"><a name="a13"></a><span class="src-doc">$c-&gt;validate(&nbsp;$_POST['code'],&nbsp;'MyAlias'&nbsp;);</span></div></li>
<li><div class="src-line"><a name="a14"></a><span class="src-doc">&lt;/code&gt;</span></div></li>
<li><div class="src-line"><a name="a15"></a><span class="src-doc">&nbsp;*&nbsp;</span></div></li>
<li><div class="src-line"><a name="a16"></a><span class="src-doc">&nbsp;*&nbsp;</span><span class="src-doc-coretag">@package</span><span class="src-doc">&nbsp;DomBase</span></div></li>
<li><div class="src-line"><a name="a17"></a><span class="src-doc">&nbsp;*&nbsp;</span><span class="src-doc-coretag">@author</span><span class="src-doc">&nbsp;Oliver&nbsp;Leisalu,&nbsp;Inditel&nbsp;Meedia&nbsp;OÜ</span></div></li>
<li><div class="src-line"><a name="a18"></a><span class="src-doc">&nbsp;*/</span></div></li>
<li><div class="src-line"><a name="a19"></a><span class="src-key">class&nbsp;</span><a href="../DomBase/DomCaptcha.html">DomCaptcha</a>&nbsp;<span class="src-sym">{</span></div></li>
<li><div class="src-line"><a name="a20"></a>&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-doc">/**</span></div></li>
<li><div class="src-line"><a name="a21"></a><span class="src-doc">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;</span><span class="src-doc-coretag">@var&nbsp;</span><span class="src-doc-type">String&nbsp;</span></div></li>
<li><div class="src-line"><a name="a22"></a><span class="src-doc">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*/</span></div></li>
<li><div class="src-line"><a name="a23"></a>&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-key">private&nbsp;</span><span class="src-var">$font</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a24"></a>&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-doc">/**</span></div></li>
<li><div class="src-line"><a name="a25"></a><span class="src-doc">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;</span><span class="src-doc-coretag">@var&nbsp;</span><span class="src-doc-type">Int&nbsp;</span></div></li>
<li><div class="src-line"><a name="a26"></a><span class="src-doc">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*/</span></div></li>
<li><div class="src-line"><a name="a27"></a>&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-key">private&nbsp;</span><span class="src-var">$width&nbsp;</span>=&nbsp;<span class="src-num">80</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a28"></a>&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-doc">/**</span></div></li>
<li><div class="src-line"><a name="a29"></a><span class="src-doc">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;</span><span class="src-doc-coretag">@var&nbsp;</span><span class="src-doc-type">Int&nbsp;</span></div></li>
<li><div class="src-line"><a name="a30"></a><span class="src-doc">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*/</span></div></li>
<li><div class="src-line"><a name="a31"></a>&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-key">private&nbsp;</span><span class="src-var">$height&nbsp;</span>=&nbsp;<span class="src-num">40</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a32"></a>&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-doc">/**</span></div></li>
<li><div class="src-line"><a name="a33"></a><span class="src-doc">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;</span><span class="src-doc-coretag">@var&nbsp;</span><span class="src-doc-type">Int&nbsp;</span></div></li>
<li><div class="src-line"><a name="a34"></a><span class="src-doc">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*/</span></div></li>
<li><div class="src-line"><a name="a35"></a>&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-key">private&nbsp;</span><span class="src-var">$characters&nbsp;</span>=&nbsp;<span class="src-num">4</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a36"></a>&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-doc">/**</span></div></li>
<li><div class="src-line"><a name="a37"></a><span class="src-doc">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;</span><span class="src-doc-coretag">@var&nbsp;</span><span class="src-doc-type">String&nbsp;</span></div></li>
<li><div class="src-line"><a name="a38"></a><span class="src-doc">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*/</span></div></li>
<li><div class="src-line"><a name="a39"></a>&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-key">private&nbsp;</span><span class="src-var">$code</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a40"></a>&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-doc">/**</span></div></li>
<li><div class="src-line"><a name="a41"></a><span class="src-doc">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;Alias&nbsp;is&nbsp;used&nbsp;if&nbsp;more&nbsp;than&nbsp;one&nbsp;captcha&nbsp;is&nbsp;used&nbsp;on&nbsp;webpage.</span></div></li>
<li><div class="src-line"><a name="a42"></a><span class="src-doc">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;Set&nbsp;different&nbsp;aliases&nbsp;to&nbsp;validate&nbsp;different&nbsp;captchas&nbsp;that&nbsp;are&nbsp;shown&nbsp;at&nbsp;the&nbsp;same&nbsp;time.</span></div></li>
<li><div class="src-line"><a name="a43"></a><span class="src-doc">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;</span></div></li>
<li><div class="src-line"><a name="a44"></a><span class="src-doc">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;</span><span class="src-doc-coretag">@var&nbsp;</span><span class="src-doc-type">String&nbsp;</span></div></li>
<li><div class="src-line"><a name="a45"></a><span class="src-doc">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*/</span></div></li>
<li><div class="src-line"><a name="a46"></a>&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-key">private&nbsp;</span><span class="src-var">$alias</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a47"></a>&nbsp;&nbsp;&nbsp;&nbsp;</div></li>
<li><div class="src-line"><a name="a48"></a>&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-key">const&nbsp;</span><span class="src-id">SESSION_VAR&nbsp;</span>=&nbsp;<span class="src-str">'DomCaptchaCode'</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a49"></a>&nbsp;&nbsp;&nbsp;&nbsp;</div></li>
<li><div class="src-line"><a name="a50"></a>&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-key">const&nbsp;</span><span class="src-id">DEFAULT_ALIAS&nbsp;</span>=&nbsp;<span class="src-str">'default'</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a51"></a>&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-doc">/**</span></div></li>
<li><div class="src-line"><a name="a52"></a><span class="src-doc">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;</span><span class="src-doc-coretag">@param&nbsp;</span><span class="src-doc-type">String&nbsp;</span><span class="src-doc-var">$alias&nbsp;</span></div></li>
<li><div class="src-line"><a name="a53"></a><span class="src-doc">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*/</span></div></li>
<li><div class="src-line"><a name="a54"></a>&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-key">public&nbsp;</span><span class="src-key">function&nbsp;</span><a href="../DomBase/DomCaptcha.html#method__construct">__construct</a><span class="src-sym">(&nbsp;</span><span class="src-var">$alias&nbsp;</span>=&nbsp;<span class="src-id">self</span><span class="src-sym">::</span><span class="src-id">DEFAULT_ALIAS&nbsp;</span><span class="src-sym">)&nbsp;</span><span class="src-sym">{</span></div></li>
<li><div class="src-line"><a name="a55"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$this</span><span class="src-sym">-&gt;</span><span class="src-var">font&nbsp;</span>=&nbsp;<a href="http://www.php.net/dirname">dirname</a><span class="src-sym">(</span>__FILE__<span class="src-sym">)&nbsp;</span>.&nbsp;<span class="src-str">'/monofont.ttf'</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a56"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$this</span><span class="src-sym">-&gt;</span><span class="src-var">alias&nbsp;</span>=&nbsp;<span class="src-var">$alias</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a57"></a>&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-sym">}</span></div></li>
<li><div class="src-line"><a name="a58"></a>&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-doc">/**</span></div></li>
<li><div class="src-line"><a name="a59"></a><span class="src-doc">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;</span><span class="src-doc-coretag">@param&nbsp;</span><span class="src-doc-type">String&nbsp;</span><span class="src-doc-var">$var&nbsp;</span></div></li>
<li><div class="src-line"><a name="a60"></a><span class="src-doc">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;</span><span class="src-doc-coretag">@param&nbsp;</span><span class="src-doc-type">Mixed&nbsp;</span><span class="src-doc-var">$value&nbsp;</span></div></li>
<li><div class="src-line"><a name="a61"></a><span class="src-doc">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*/</span></div></li>
<li><div class="src-line"><a name="a62"></a>&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-key">public&nbsp;</span><span class="src-key">function&nbsp;</span><a href="../DomBase/DomCaptcha.html#method__set">__set</a><span class="src-sym">(&nbsp;</span><span class="src-var">$var</span><span class="src-sym">,&nbsp;</span><span class="src-var">$value&nbsp;</span><span class="src-sym">)&nbsp;</span><span class="src-sym">{</span></div></li>
<li><div class="src-line"><a name="a63"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$this</span><span class="src-sym">-&gt;</span><span class="src-var">$var&nbsp;</span>=&nbsp;<span class="src-var">$value</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a64"></a>&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-sym">}</span></div></li>
<li><div class="src-line"><a name="a65"></a>&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-doc">/**</span></div></li>
<li><div class="src-line"><a name="a66"></a><span class="src-doc">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;</span><span class="src-doc-coretag">@param&nbsp;</span><span class="src-doc-type">Mixed&nbsp;</span><span class="src-doc-var">$var&nbsp;</span></div></li>
<li><div class="src-line"><a name="a67"></a><span class="src-doc">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;</span><span class="src-doc-coretag">@return&nbsp;</span><span class="src-doc-type">String&nbsp;</span></div></li>
<li><div class="src-line"><a name="a68"></a><span class="src-doc">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*/</span></div></li>
<li><div class="src-line"><a name="a69"></a>&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-key">public&nbsp;</span><span class="src-key">function&nbsp;</span><a href="../DomBase/DomCaptcha.html#method__get">__get</a><span class="src-sym">(&nbsp;</span><span class="src-var">$var&nbsp;</span><span class="src-sym">)&nbsp;</span><span class="src-sym">{</span></div></li>
<li><div class="src-line"><a name="a70"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-key">return&nbsp;</span><span class="src-var">$this</span><span class="src-sym">-&gt;</span><span class="src-var">$var</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a71"></a>&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-sym">}</span></div></li>
<li><div class="src-line"><a name="a72"></a>&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-doc">/**</span></div></li>
<li><div class="src-line"><a name="a73"></a><span class="src-doc">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;</span><span class="src-doc-coretag">@param&nbsp;</span><span class="src-doc-type">String&nbsp;</span><span class="src-doc-var">$code&nbsp;</span></div></li>
<li><div class="src-line"><a name="a74"></a><span class="src-doc">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;</span><span class="src-doc-coretag">@param&nbsp;</span><span class="src-doc-type">String&nbsp;</span><span class="src-doc-var">$alias&nbsp;</span></div></li>
<li><div class="src-line"><a name="a75"></a><span class="src-doc">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;</span><span class="src-doc-coretag">@return&nbsp;</span><span class="src-doc-type">Bool&nbsp;</span></div></li>
<li><div class="src-line"><a name="a76"></a><span class="src-doc">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*/</span></div></li>
<li><div class="src-line"><a name="a77"></a>&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-key">public&nbsp;</span><span class="src-key">static&nbsp;</span><span class="src-key">function&nbsp;</span><a href="../DomBase/DomCaptcha.html#methodvalidate">validate</a><span class="src-sym">(&nbsp;</span><span class="src-var">$code</span><span class="src-sym">,&nbsp;</span><span class="src-var">$alias&nbsp;</span>=&nbsp;<span class="src-id">self</span><span class="src-sym">::</span><span class="src-id">DEFAULT_ALIAS&nbsp;</span><span class="src-sym">)&nbsp;</span><span class="src-sym">{</span></div></li>
<li><div class="src-line"><a name="a78"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$result&nbsp;</span>=&nbsp;<span class="src-var">$code&nbsp;</span>==&nbsp;<span class="src-var">$_SESSION</span><span class="src-sym">[</span><span class="src-id">self</span><span class="src-sym">::</span><span class="src-id">SESSION_VAR</span><span class="src-sym">]</span><span class="src-sym">[</span><span class="src-var">$alias</span><span class="src-sym">]</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a79"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;unset<span class="src-sym">(</span><span class="src-var">$_SESSION</span><span class="src-sym">[</span><span class="src-id">self</span><span class="src-sym">::</span><span class="src-id">SESSION_VAR</span><span class="src-sym">]</span><span class="src-sym">[</span><span class="src-var">$alias</span><span class="src-sym">]</span><span class="src-sym">)</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a80"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-key">return&nbsp;</span><span class="src-var">$result</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a81"></a>&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-sym">}</span></div></li>
<li><div class="src-line"><a name="a82"></a>&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-doc">/**</span></div></li>
<li><div class="src-line"><a name="a83"></a><span class="src-doc">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;Generates&nbsp;code</span></div></li>
<li><div class="src-line"><a name="a84"></a><span class="src-doc">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*/</span></div></li>
<li><div class="src-line"><a name="a85"></a>&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-key">private&nbsp;</span><span class="src-key">function&nbsp;</span><span class="src-id">generateCode</span><span class="src-sym">(</span><span class="src-sym">)&nbsp;</span><span class="src-sym">{</span></div></li>
<li><div class="src-line"><a name="a86"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</div></li>
<li><div class="src-line"><a name="a87"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-comm">/*&nbsp;list&nbsp;all&nbsp;possible&nbsp;characters,&nbsp;similar&nbsp;looking&nbsp;characters&nbsp;and&nbsp;vowels&nbsp;have&nbsp;been&nbsp;removed&nbsp;*/</span></div></li>
<li><div class="src-line"><a name="a88"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$possible&nbsp;</span>=&nbsp;<span class="src-str">'23456789bcdfghjkmnpqrstvwxyz'</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a89"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$code&nbsp;</span>=&nbsp;<span class="src-str">''</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a90"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$i&nbsp;</span>=&nbsp;<span class="src-num">0</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a91"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-key">while&nbsp;</span><span class="src-sym">(</span><span class="src-var">$i&nbsp;</span>&lt;&nbsp;<span class="src-var">$this</span><span class="src-sym">-&gt;</span><span class="src-var">characters</span><span class="src-sym">)&nbsp;</span><span class="src-sym">{&nbsp;</span></div></li>
<li><div class="src-line"><a name="a92"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$code&nbsp;</span>.=&nbsp;<a href="http://www.php.net/substr">substr</a><span class="src-sym">(</span><span class="src-var">$possible</span><span class="src-sym">,&nbsp;</span><a href="http://www.php.net/mt_rand">mt_rand</a><span class="src-sym">(</span><span class="src-num">0</span><span class="src-sym">,&nbsp;</span><a href="http://www.php.net/strlen">strlen</a><span class="src-sym">(</span><span class="src-var">$possible</span><span class="src-sym">)</span>-<span class="src-num">1</span><span class="src-sym">)</span><span class="src-sym">,&nbsp;</span><span class="src-num">1</span><span class="src-sym">)</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a93"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$i</span>++<span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a94"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-sym">}</span></div></li>
<li><div class="src-line"><a name="a95"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$this</span><span class="src-sym">-&gt;</span><span class="src-var">code&nbsp;</span>=&nbsp;<span class="src-var">$code</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a96"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$_SESSION</span><span class="src-sym">[</span><span class="src-id">self</span><span class="src-sym">::</span><span class="src-id">SESSION_VAR</span><span class="src-sym">]</span><span class="src-sym">[</span><span class="src-var">$this</span><span class="src-sym">-&gt;</span><span class="src-var">alias</span><span class="src-sym">]&nbsp;</span>=&nbsp;<span class="src-var">$this</span><span class="src-sym">-&gt;</span><span class="src-var">code</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a97"></a>&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-sym">}</span></div></li>
<li><div class="src-line"><a name="a98"></a>&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-doc">/**</span></div></li>
<li><div class="src-line"><a name="a99"></a><span class="src-doc">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;Shows&nbsp;captcha&nbsp;image.&nbsp;Sets&nbsp;correct&nbsp;headers&nbsp;etc..</span></div></li>
<li><div class="src-line"><a name="a100"></a><span class="src-doc">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*/</span></div></li>
<li><div class="src-line"><a name="a101"></a>&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-key">public&nbsp;</span><span class="src-key">function&nbsp;</span><a href="../DomBase/DomCaptcha.html#methodshowImage">showImage</a><span class="src-sym">(</span><span class="src-sym">)&nbsp;</span><span class="src-sym">{</span></div></li>
<li><div class="src-line"><a name="a102"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-key">if</span><span class="src-sym">(&nbsp;</span><span class="src-sym">!</span><span class="src-var">$this</span><span class="src-sym">-&gt;</span><span class="src-var">code&nbsp;</span><span class="src-sym">)</span></div></li>
<li><div class="src-line"><a name="a103"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$this</span><span class="src-sym">-&gt;</span><span class="src-id">generateCode</span><span class="src-sym">(</span><span class="src-sym">)</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a104"></a>&nbsp;</div></li>
<li><div class="src-line"><a name="a105"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-comm">/*&nbsp;font&nbsp;size&nbsp;will&nbsp;be&nbsp;75%&nbsp;of&nbsp;the&nbsp;image&nbsp;height&nbsp;*/</span></div></li>
<li><div class="src-line"><a name="a106"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$font_size&nbsp;</span>=&nbsp;<span class="src-var">$this</span><span class="src-sym">-&gt;</span><span class="src-var">height&nbsp;</span>*&nbsp;<span class="src-num">0.75</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a107"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$image&nbsp;</span>=&nbsp;<a href="http://www.php.net/imagecreate">imagecreate</a><span class="src-sym">(</span><span class="src-var">$this</span><span class="src-sym">-&gt;</span><span class="src-var">width</span><span class="src-sym">,&nbsp;</span><span class="src-var">$this</span><span class="src-sym">-&gt;</span><span class="src-var">height</span><span class="src-sym">)</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a108"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-comm">/*&nbsp;set&nbsp;the&nbsp;colours&nbsp;*/</span></div></li>
<li><div class="src-line"><a name="a109"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$background_color&nbsp;</span>=&nbsp;<a href="http://www.php.net/imagecolorallocate">imagecolorallocate</a><span class="src-sym">(</span><span class="src-var">$image</span><span class="src-sym">,&nbsp;</span><span class="src-num">255</span><span class="src-sym">,&nbsp;</span><span class="src-num">255</span><span class="src-sym">,&nbsp;</span><span class="src-num">255</span><span class="src-sym">)</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a110"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$text_color&nbsp;</span>=&nbsp;<a href="http://www.php.net/imagecolorallocate">imagecolorallocate</a><span class="src-sym">(</span><span class="src-var">$image</span><span class="src-sym">,&nbsp;</span><span class="src-num">20</span><span class="src-sym">,&nbsp;</span><span class="src-num">40</span><span class="src-sym">,&nbsp;</span><span class="src-num">100</span><span class="src-sym">)</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a111"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$noise_color&nbsp;</span>=&nbsp;<a href="http://www.php.net/imagecolorallocate">imagecolorallocate</a><span class="src-sym">(</span><span class="src-var">$image</span><span class="src-sym">,&nbsp;</span><span class="src-num">100</span><span class="src-sym">,&nbsp;</span><span class="src-num">120</span><span class="src-sym">,&nbsp;</span><span class="src-num">180</span><span class="src-sym">)</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a112"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-comm">/*&nbsp;generate&nbsp;random&nbsp;dots&nbsp;in&nbsp;background&nbsp;*/</span></div></li>
<li><div class="src-line"><a name="a113"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-key">for</span><span class="src-sym">(&nbsp;</span><span class="src-var">$i</span>=<span class="src-num">0</span><span class="src-sym">;&nbsp;</span><span class="src-var">$i</span>&lt;<span class="src-sym">(</span><span class="src-var">$this</span><span class="src-sym">-&gt;</span><span class="src-var">width</span>*<span class="src-var">$this</span><span class="src-sym">-&gt;</span><span class="src-var">height</span><span class="src-sym">)</span>/<span class="src-num">3</span><span class="src-sym">;&nbsp;</span><span class="src-var">$i</span>++&nbsp;<span class="src-sym">)&nbsp;</span><span class="src-sym">{</span></div></li>
<li><div class="src-line"><a name="a114"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<a href="http://www.php.net/imagefilledellipse">imagefilledellipse</a><span class="src-sym">(</span><span class="src-var">$image</span><span class="src-sym">,&nbsp;</span><a href="http://www.php.net/mt_rand">mt_rand</a><span class="src-sym">(</span><span class="src-num">0</span><span class="src-sym">,</span><span class="src-var">$this</span><span class="src-sym">-&gt;</span><span class="src-var">width</span><span class="src-sym">)</span><span class="src-sym">,&nbsp;</span><a href="http://www.php.net/mt_rand">mt_rand</a><span class="src-sym">(</span><span class="src-num">0</span><span class="src-sym">,</span><span class="src-var">$this</span><span class="src-sym">-&gt;</span><span class="src-var">height</span><span class="src-sym">)</span><span class="src-sym">,&nbsp;</span><span class="src-num">1</span><span class="src-sym">,&nbsp;</span><span class="src-num">1</span><span class="src-sym">,&nbsp;</span><span class="src-var">$noise_color</span><span class="src-sym">)</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a115"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-sym">}</span></div></li>
<li><div class="src-line"><a name="a116"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-comm">/*&nbsp;generate&nbsp;random&nbsp;lines&nbsp;in&nbsp;background&nbsp;*/</span></div></li>
<li><div class="src-line"><a name="a117"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-key">for</span><span class="src-sym">(&nbsp;</span><span class="src-var">$i</span>=<span class="src-num">0</span><span class="src-sym">;&nbsp;</span><span class="src-var">$i</span>&lt;<span class="src-sym">(</span><span class="src-var">$this</span><span class="src-sym">-&gt;</span><span class="src-var">width</span>*<span class="src-var">$this</span><span class="src-sym">-&gt;</span><span class="src-var">height</span><span class="src-sym">)</span>/<span class="src-num">150</span><span class="src-sym">;&nbsp;</span><span class="src-var">$i</span>++&nbsp;<span class="src-sym">)&nbsp;</span><span class="src-sym">{</span></div></li>
<li><div class="src-line"><a name="a118"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<a href="http://www.php.net/imageline">imageline</a><span class="src-sym">(</span><span class="src-var">$image</span><span class="src-sym">,&nbsp;</span><a href="http://www.php.net/mt_rand">mt_rand</a><span class="src-sym">(</span><span class="src-num">0</span><span class="src-sym">,</span><span class="src-var">$this</span><span class="src-sym">-&gt;</span><span class="src-var">width</span><span class="src-sym">)</span><span class="src-sym">,&nbsp;</span><a href="http://www.php.net/mt_rand">mt_rand</a><span class="src-sym">(</span><span class="src-num">0</span><span class="src-sym">,</span><span class="src-var">$this</span><span class="src-sym">-&gt;</span><span class="src-var">height</span><span class="src-sym">)</span><span class="src-sym">,&nbsp;</span><a href="http://www.php.net/mt_rand">mt_rand</a><span class="src-sym">(</span><span class="src-num">0</span><span class="src-sym">,</span><span class="src-var">$this</span><span class="src-sym">-&gt;</span><span class="src-var">width</span><span class="src-sym">)</span><span class="src-sym">,&nbsp;</span><a href="http://www.php.net/mt_rand">mt_rand</a><span class="src-sym">(</span><span class="src-num">0</span><span class="src-sym">,</span><span class="src-var">$this</span><span class="src-sym">-&gt;</span><span class="src-var">height</span><span class="src-sym">)</span><span class="src-sym">,&nbsp;</span><span class="src-var">$noise_color</span><span class="src-sym">)</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a119"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-sym">}</span></div></li>
<li><div class="src-line"><a name="a120"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-comm">/*&nbsp;create&nbsp;textbox&nbsp;and&nbsp;add&nbsp;text&nbsp;*/</span></div></li>
<li><div class="src-line"><a name="a121"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$textbox&nbsp;</span>=&nbsp;<a href="http://www.php.net/imagettfbbox">imagettfbbox</a><span class="src-sym">(</span><span class="src-var">$font_size</span><span class="src-sym">,&nbsp;</span><span class="src-num">0</span><span class="src-sym">,&nbsp;</span><span class="src-var">$this</span><span class="src-sym">-&gt;</span><span class="src-var">font</span><span class="src-sym">,&nbsp;</span><span class="src-var">$this</span><span class="src-sym">-&gt;</span><span class="src-var">code</span><span class="src-sym">)</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a122"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$x&nbsp;</span>=&nbsp;<span class="src-sym">(</span><span class="src-var">$this</span><span class="src-sym">-&gt;</span><span class="src-var">width&nbsp;</span>-&nbsp;<span class="src-var">$textbox</span><span class="src-sym">[</span><span class="src-num">4</span><span class="src-sym">]</span><span class="src-sym">)</span>/<span class="src-num">2</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a123"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-var">$y&nbsp;</span>=&nbsp;<span class="src-sym">(</span><span class="src-var">$this</span><span class="src-sym">-&gt;</span><span class="src-var">height&nbsp;</span>-&nbsp;<span class="src-var">$textbox</span><span class="src-sym">[</span><span class="src-num">5</span><span class="src-sym">]</span><span class="src-sym">)</span>/<span class="src-num">2</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a124"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<a href="http://www.php.net/imagettftext">imagettftext</a><span class="src-sym">(</span><span class="src-var">$image</span><span class="src-sym">,&nbsp;</span><span class="src-var">$font_size</span><span class="src-sym">,&nbsp;</span><span class="src-num">0</span><span class="src-sym">,&nbsp;</span><span class="src-var">$x</span><span class="src-sym">,&nbsp;</span><span class="src-var">$y</span><span class="src-sym">,&nbsp;</span><span class="src-var">$text_color</span><span class="src-sym">,&nbsp;</span><span class="src-var">$this</span><span class="src-sym">-&gt;</span><span class="src-var">font&nbsp;</span><span class="src-sym">,&nbsp;</span><span class="src-var">$this</span><span class="src-sym">-&gt;</span><span class="src-var">code</span><span class="src-sym">)</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a125"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="src-comm">/*&nbsp;output&nbsp;captcha&nbsp;image&nbsp;to&nbsp;browser&nbsp;*/</span></div></li>
<li><div class="src-line"><a name="a126"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<a href="http://www.php.net/header">header</a><span class="src-sym">(</span><span class="src-str">'Content-Type:&nbsp;image/jpeg'</span><span class="src-sym">)</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a127"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<a href="http://www.php.net/imagejpeg">imagejpeg</a><span class="src-sym">(</span><span class="src-var">$image</span><span class="src-sym">)</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a128"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<a href="http://www.php.net/imagedestroy">imagedestroy</a><span class="src-sym">(</span><span class="src-var">$image</span><span class="src-sym">)</span><span class="src-sym">;</span></div></li>
<li><div class="src-line"><a name="a129"></a>&nbsp;&nbsp;&nbsp;<span class="src-sym">}</span></div></li>
<li><div class="src-line"><a name="a130"></a>&nbsp;&nbsp;&nbsp;&nbsp;</div></li>
<li><div class="src-line"><a name="a131"></a>&nbsp;&nbsp;&nbsp;&nbsp;</div></li>
<li><div class="src-line"><a name="a132"></a><span class="src-sym">}</span></div></li>
<li><div class="src-line"><a name="a133"></a><span class="src-php">?&gt;</span></div></li>
</ol></div>
</div>
	<p class="notes" id="credit">
		Documentation generated on Fri, 24 Sep 2010 21:13:20 +0000 by <a href="http://www.phpdoc.org" target="_blank">phpDocumentor 1.4.1</a>
	</p>
	</body>
</html>